Oil and Gas Safety Supply Men's FR Button Down Shirt Work Shirt. FRC. Basic. Flame resistant fabric 7 oz shirt: 90% FR pima cotton/ 10% nylon Button-down front, collar and cuffs You can dry clean this flame resistant garment. Ratings for flame retardant or flash fire: CAT 2 ATPV 9.2 NFPA 70E NFPA 2112